Ambiguity can be said to be repeated in the use of modern Chinese. The reason is not that the words themselves are ambiguous, but that people have always misunderstood or misrepresented them in the process of use and dissemination, which has caused great inconvenience. For example, in modern idioms, "tomorrow's yellow flowers" can easily be understood as things of the future, but it actually refers to outdated and dead things; "groundless" originally means that things happen for a reason; "July filariasis" means that autumn begins, the weather turns cold, and so on. There are many other words that are generally ambiguous, and some even become positive after long-term use, so we should pay attention to them.